GB1503085A - Method for removing sulphur dioxide from an exhaust gas - Google Patents
Method for removing sulphur dioxide from an exhaust gasInfo
- Publication number
- GB1503085A GB1503085A GB25981/76A GB2598176A GB1503085A GB 1503085 A GB1503085 A GB 1503085A GB 25981/76 A GB25981/76 A GB 25981/76A GB 2598176 A GB2598176 A GB 2598176A GB 1503085 A GB1503085 A GB 1503085A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- exhaust gas
- sulphite
- concentration
- oxidized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title 2
- 235000010269 sulphur dioxide Nutrition 0.000 title 1
- 239000004291 sulphur dioxide Substances 0.000 title 1
- 239000000243 solution Substances 0.000 abstract 8
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract 3
- 229910052783 alkali metal Inorganic materials 0.000 abstract 3
- 150000001340 alkali metals Chemical class 0.000 abstract 3
- 150000003839 salts Chemical class 0.000 abstract 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 2
- 230000002745 absorbent Effects 0.000 abstract 2
- 239000002250 absorbent Substances 0.000 abstract 2
- 229910052749 magnesium Inorganic materials 0.000 abstract 2
- 239000011777 magnesium Substances 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000007664 blowing Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 159000000003 magnesium salts Chemical class 0.000 abstract 1
- 150000007524 organic acids Chemical class 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
1503085 Removing SO 2 from exhaust gas KUREHA KAGAKU KOGYO KK 22 June 1976 [23 June 1975] 25981/76 Heading CIA In the removal of SO 2 from exhaust gas by (1) contacting the gas with an aqueous solution of an alkali metal, ammonium, or magnesium salt of an organic acid to form the corresponding sulphite; (2) blowing O 2 or O 2 -containing gas into at least part of the resultant solution to oxidize the sulphite to sulphate; (3) adding CaCO 3 or Ca(OH) 2 to produce CaSO 4 À2H 2 O and regenerate the alkali metal, ammonium or magnesium organic salt in the solution; (4) separating the from the solution; and (5) recycling the solution together with any solution from step (1) which was not subjected to oxidation in step (2) to the gascontact zone; the improvement comprising causing the absorbent solution to contain not less than 0À3 wt. per cent crystalline immediately prior to contact with the exhaust gas, and maintaining a concentration of alkali metal, ammonium or magnesium organic salt in the solution, immediately after contact, of not more than 2 wt. per cent. The concentration of may be controlled by adjusting the quantity of separated in step (4), and the required concentration of sulphite may be maintained by adjusting the amount of sulphite oxidized in step (2). When the exhaust gas contains Clions, their concentration may be minimized by concentrating a part of the circulating liquid sufficiently to cause Cl<SP>-</SP> to precipitate as salt. Embodiments are illustrated in which the whole or a part of the loaded absorbent is oxidized, and the whole or a part of the oxidized solution is reacted with Ca<SP>++</SP>.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50077224A JPS51151697A (en) | 1975-06-23 | 1975-06-23 | Method for removal of sulfur dioxide in exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1503085A true GB1503085A (en) | 1978-03-08 |
Family
ID=13627870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25981/76A Expired GB1503085A (en) | 1975-06-23 | 1976-06-22 | Method for removing sulphur dioxide from an exhaust gas |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4092402A (en) |
| JP (1) | JPS51151697A (en) |
| AT (1) | AT365095B (en) |
| CA (1) | CA1091898A (en) |
| CS (1) | CS191978B2 (en) |
| DE (1) | DE2627705C3 (en) |
| ES (1) | ES449102A1 (en) |
| FR (1) | FR2317220A1 (en) |
| GB (1) | GB1503085A (en) |
| HU (1) | HU175253B (en) |
| IT (1) | IT1061412B (en) |
| PL (1) | PL112644B1 (en) |
| SE (1) | SE7607130L (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53103997A (en) * | 1977-02-23 | 1978-09-09 | Chiyoda Chem Eng & Constr Co Ltd | Recovery of gypsum by desulfurization of exhaust gas |
| GB1598167A (en) * | 1977-06-06 | 1981-09-16 | Kureha Chemical Ind Co Ltd | Method for removal of sulphur dioxide from sulphur dioxide containing gas |
| JPS5853565B2 (en) * | 1978-11-06 | 1983-11-30 | 呉羽化学工業株式会社 | Desulfurization method |
| US4269806A (en) * | 1979-08-07 | 1981-05-26 | Kureha Kagaku Kogyo Kabushiki Kaisha | Scrubber for removal of sulfur dioxide from exhaust gas |
| US4337231A (en) * | 1979-08-07 | 1982-06-29 | Kureha Kagaku Kogyo Kabushiki Kaisha | Removal of sulfur dioxide from exhaust gas |
| JPS6090027A (en) * | 1983-10-25 | 1985-05-21 | Kureha Chem Ind Co Ltd | Waste gas desulfurization method |
| JPS60129121A (en) * | 1983-12-13 | 1985-07-10 | Kureha Chem Ind Co Ltd | Stack gas desulfurization process |
| CA1258961A (en) * | 1984-09-17 | 1989-09-05 | Yoshihiko Kudo | PROCESS FOR PRODUCING .alpha.-FORM GYPSUM HEMIHYDRATE |
| DE3538231A1 (en) * | 1985-10-24 | 1987-04-30 | Mannesmann Ag | Process for reprocessing waste solutions |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2090142A (en) * | 1933-12-28 | 1937-08-17 | Ici Ltd | Wet purification of gases |
| US2090143A (en) * | 1934-03-10 | 1937-08-17 | Ici Ltd | Gas washing |
| JPS5638247B2 (en) * | 1973-02-10 | 1981-09-05 | ||
| JPS49110574A (en) * | 1973-02-24 | 1974-10-21 | ||
| US3843789A (en) * | 1973-02-26 | 1974-10-22 | Air Prod & Chem | Removal of sulfur oxides from stack gas |
-
1975
- 1975-06-23 JP JP50077224A patent/JPS51151697A/en active Pending
-
1976
- 1976-06-15 US US05/696,285 patent/US4092402A/en not_active Expired - Lifetime
- 1976-06-18 HU HU76KU504A patent/HU175253B/en unknown
- 1976-06-21 DE DE2627705A patent/DE2627705C3/en not_active Expired
- 1976-06-21 CS CS764069A patent/CS191978B2/en unknown
- 1976-06-21 CA CA255,292A patent/CA1091898A/en not_active Expired
- 1976-06-22 AT AT0454676A patent/AT365095B/en not_active IP Right Cessation
- 1976-06-22 ES ES76449102A patent/ES449102A1/en not_active Expired
- 1976-06-22 SE SE7607130A patent/SE7607130L/en unknown
- 1976-06-22 GB GB25981/76A patent/GB1503085A/en not_active Expired
- 1976-06-23 FR FR7619155A patent/FR2317220A1/en active Granted
- 1976-06-23 IT IT24617/76A patent/IT1061412B/en active
- 1976-06-23 PL PL1976190650A patent/PL112644B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2627705C3 (en) | 1978-10-05 |
| FR2317220A1 (en) | 1977-02-04 |
| CS191978B2 (en) | 1979-07-31 |
| CA1091898A (en) | 1980-12-23 |
| US4092402A (en) | 1978-05-30 |
| JPS51151697A (en) | 1976-12-27 |
| DE2627705B2 (en) | 1978-02-02 |
| ES449102A1 (en) | 1977-12-01 |
| PL112644B1 (en) | 1980-10-31 |
| AT365095B (en) | 1981-12-10 |
| DE2627705A1 (en) | 1976-12-30 |
| SE7607130L (en) | 1976-12-24 |
| FR2317220B1 (en) | 1978-09-01 |
| ATA454676A (en) | 1981-05-15 |
| HU175253B (en) | 1980-06-28 |
| IT1061412B (en) | 1983-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |